Effects of elevated air temperatures on soil thermal and hydrologic processes in the active layer in an alpine meadow ecosystem of the Qinghai-Tibet Plateau
文献类型：期刊论文
| 作者 | Bai Wei1,2; Wang Genxu2,3 ; Liu Guangsheng3
|
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2012-04-01 |
| 卷号 | 9期号:2页码:243-255 |
| 关键词 | Thermal and hydrologic process Temperature Open-top chambers Alpine meadow Qinghai-Tibetan Plateau |
| ISSN号 | 1672-6316 |
| 通讯作者 | WANG Genxu |
| 英文摘要 | In this study, effects of elevated air temperatures on thermal and hydrologic process of the shallow soil in the active layer were investigated. Open-top chambers (OTCs) were utilized to increase air temperatures 1-2A degrees C in OTC-1 and 3-5A degrees C in OTC-2 in the alpine meadow ecosystem on the Qinghai-Tibetan Plateau. Results show that the annual air temperatures under OTC-1 and OTC-2 were 1.21A degrees C and 3.62A degrees C higher than the Control, respectively. The entirely-frozen period of shallow soil in the active layer was shortened and the fully thawed period was prolonged with temperature increase. The maximum penetration depth and duration of the negative isotherm during the entirely-frozen period decreased, and soil freezing was retarded in the local scope of the soil profile when temperature increased. Meanwhile, the positive isotherm during the fully-thawed period increased, and the soil thawing was accelerated. Soil moisture under different manipulations decreased with the temperature increase at the same depth. During the early freezing period and the early fullythawed period, the maximum soil moisture under the Control manipulation was at 0.2 m deep, whereas under OTC-1 and OTC-2 manipulations, the maximum soil moisture were at 0.4-0.5 m deep. These results indicate that elevated temperatures led to a decrease of the moisture in the surface soil. The coupled relationship between soil temperature and moisture was significantly affected by the temperature increase. During the freezing and thawing processes, the soil temperature and moisture under different manipulations fit the regression model given by the equation theta (V)=a/{;1+exp[b(TS+c)]}+d. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Environmental Sciences |
| 研究领域[WOS] | Environmental Sciences & Ecology |
| 关键词[WOS] | FROZEN SOIL ; CLIMATE-CHANGE ; COASTAL-PLAIN ; WATER-CONTENT ; SNOW COVER ; PERMAFROST ; VEGETATION ; DEGRADATION ; REGION ; GREENHOUSES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000301788100011 |
| 公开日期 | 2013-04-15 |
| 源URL | [http://192.168.143.20:8080/handle/131551/5085]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2012_Vol9 No.2 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 作者单位 | 1.Lanzhou Jiaotong Univ, Sch Environm & Municipal Engn, Lanzhou 730070, Peoples R China 2.Lanzhou Univ, Coll Resource & Environm Sci, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bai Wei,Wang Genxu,Liu Guangsheng. Effects of elevated air temperatures on soil thermal and hydrologic processes in the active layer in an alpine meadow ecosystem of the Qinghai-Tibet Plateau[J]. JOURNAL OF MOUNTAIN SCIENCE,2012,9(2):243-255. |
| APA | Bai Wei,Wang Genxu,&Liu Guangsheng.(2012).Effects of elevated air temperatures on soil thermal and hydrologic processes in the active layer in an alpine meadow ecosystem of the Qinghai-Tibet Plateau.JOURNAL OF MOUNTAIN SCIENCE,9(2),243-255. |
| MLA | Bai Wei,et al."Effects of elevated air temperatures on soil thermal and hydrologic processes in the active layer in an alpine meadow ecosystem of the Qinghai-Tibet Plateau".JOURNAL OF MOUNTAIN SCIENCE 9.2(2012):243-255. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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